C++ Institute Exam CPP Topic 7 Question 86 Discussion

Actual exam question for C++ Institute's CPP exam

Question #: 86
Topic #: 7

[All CPP Questions]

What happens when you attempt to compile and run the following code?

#include

using namespace std;

int main () {

int t[] = {1,2,3,3,5,1,2,4,4,5};

vector v (t,t+10);

vector::iterator it = v.begin();

while ( (it = adjacent_find (it, v.end())) != v.end()) {

cout<

}

cout<< endl;

return 0;

}

Aprogram outputs: 2 3

Bprogram outputs: 2 7

Cprogram outputs: 3 8

Dcompilation error

Eprogram will run forever

Show Suggested Answer

Suggested Answer: E

by Stefan at Jun 02, 2024, 08:45 AM

Limited Time Offer

25%

Off

Get Premium CPP Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

Submit Cancel

Dalene

28 days ago

I bet the correct answer is a compilation error. I mean, come on, who writes code like this? It's like a riddle wrapped in a mystery inside an enigma.

upvoted 0 times

...

Gabriele

30 days ago

Hold on, is this the real life? Or is this just fantasy? I'm so confused, I think I need to go take a nap and come back to this question later.

upvoted 0 times

Huey

11 days ago

User1: Don't worry, just take a break and come back later.

upvoted 0 times

...

Lea

1 months ago

Wait, is this a trick question? I'm pretty sure the program will run forever because the while loop never terminates. It's like an infinite loop of finding adjacent duplicates!

upvoted 0 times

Mignon

5 days ago

E) program will run forever

upvoted 0 times

...

Cassie

7 days ago

C) program outputs: 3 8

upvoted 0 times

...

Kris

28 days ago

B) program outputs: 2 7

upvoted 0 times

...

Lorean

1 months ago

A) program outputs: 2 3

upvoted 0 times

...

Tawanna

2 months ago

I think the output will be 3 8, because the adjacent_find function will return the iterator pointing to the second pair of duplicates, which is the second 4 in the vector.

upvoted 0 times

Matthew

1 months ago

D) compilation error

upvoted 0 times

...

Cassi

1 months ago

C) program outputs: 3 8

upvoted 0 times

...

Irma

1 months ago

B) program outputs: 2 7

upvoted 0 times

...

Rosita

1 months ago

A) program outputs: 2 3

upvoted 0 times

...

Julieta

2 months ago

I'm not sure, but I think the answer might be B) program outputs: 2 7 because the iterator is incremented by 1 each time.

upvoted 0 times

...

Lashonda

2 months ago

I agree with Tiffiny, because the code uses adjacent_find to find the first occurrence of two adjacent elements that are equal.

upvoted 0 times

...

Malcolm

2 months ago

The output will be 2 7, since the adjacent_find function will return the first iterator pointing to the first duplicate element, which is the second 3 in the vector.

upvoted 0 times